[taolson]

Yes, `&` (reverse apply) is equivalent to `|>`, but it is interesting that there is no common operator for reversed compose `.`, so function compositions are still read right-to-left.

In my programming language, I added `.>` as a reverse-compose operator, so pipelines of function compositions can also be read uniformly left-to-right, e.g.

    process = map validate .> catMaybes .> mapM persist

[1-more]

Elm (written in Haskell) uses |> and <| for pipelining forwards and backwards, and function composition is >> and <<. These have made it into Haskell via nri-prelude https://hackage.haskell.org/package/nri-prelude (written by a company that uses a lot of Elm in order to make writing Haskell look more like writing Elm).

There is also https://hackage.haskell.org/package/flow which uses .> and <. for function composition.

EDIT: in no way do I want to claim the originality of these things in Elm or the Haskell package inspired by it. AFAIK |> came from F# but it could be miles earlier.

[shadytrees]

Maybe not common, but there’s Control.Arrow.(>>>)